Need a sure-fire way to start fire and don’t want to rely on matches or a lighter, which’ll run out? Check out this Tinder Hot Box Fire Starter ($40). Stick a little tinder in the centre there, and the box acts as a parabolic reflector, heating your tinder up until it ignites. So, you can always have fire. As long as it’s sunny out—which rules out night time, poor weather, or nuclear winter.